很多时候需要使用js 实现页面跳转之后记住当前的状态

<div class="fy_l_list"><a href="{:U('/members',['pid' => '-2'])}" id="nav1" title="个人信息">个人信息</a></div>
<div class="fy_l_list"><a href="{:U('/fpassword',['pid' => '-2'])}" id="nav2" title="修改密码">修改密码</a></div>
<div class="fy_l_list"><a href="{:U('/answer',['pid' => '-2'])}" id="nav3" title="风险评测">风险评测</a></div>
<!--<div class="fy_l_list"><a href="#" title="我的财富">我的财富</a></div>
<div class="fy_l_list"><a href="#" title="预约管理">预约管理</a></div>-->
<div class="fy_l_list"><a href="{:U('/subscribe',['pid' => '-2'])}" id="nav4" title="认购管理">认购管理</a></div>
<div class="fy_l_list"><a href="{:U('/reservation',['pid' => '-2'])}" id="nav6" title="预约管理">预约管理</a></div>
<div class="fy_l_list"><a href="{:U('/message',['pid' => '-2'])}" id="nav7" title="站内信">站内信</a></div>
<div class="fy_l_list"><a href="{:U('/reply',['pid' => '-2'])}" id="nav8" title="留言回复">留言回复</a></div>
<div class="fy_l_list"><a href="{:U('/logout',['title' => '退出系统'])}"  id="nav5" title="退出系统">退出系统</a></div>
<script>$(function(){var b = window.location.href;var index = 1;var query=location.search.substring(1);var pairs = query.split("&");b = b.toLowerCase();console.log(b);if (b.indexOf("fpassword") > 0){$("#nav2").addClass("fy_on");}else if (b.indexOf("answer") > 0){$("#nav3").addClass("fy_on");}else if (b.indexOf("subscribe") > 0){$("#nav4").addClass("fy_on");}else if (b.indexOf("reservation") > 0){$("#nav6").addClass("fy_on");}else if (b.indexOf("message") > 0){$("#nav7").addClass("fy_on");}else if (b.indexOf("reply") > 0){$("#nav8").addClass("fy_on");}else{$("#nav1").addClass("fy_on");}})</script>